Leuze electronic MSI 200 Series User manual

MSI 100/200
Configurable safety modules and 
safe extension modules
USER MANUAL
2018/02 -700922 We reserve the right to make technical changes

Leuze electronic MSI 100/200 2
© 2018
Leuze electronic GmbH + Co. KG
In der Braike 1
D-73277 Owen / Germany
Phone: [phone]
Fax: [phone]
http://www.leuze.com
[email protected]
User Manual
MSI 100/200: Configurable safety modules and safe extension modules
This user manual is valid for:
The following designations are used in this manual:
Safety modules: 
designation for modules MSI 100 and MSI 200
Safe extension modules: 
designation for modules MSI-EM200-8I4IO and MSI-EM200-4RO
UM MSI 100/200, Revision 01 2018-02-01
Designation Revision 
from HW/FW
Part no.
MSI 100 MSI101 10/1636 547802
MSI102 10/1636 547812
MSI 200 MSI201 10/2033 547803
MSI202 10/2033 547813
MSI-EM200-8I4IO MSI-EM201-8I4IO 10/1021 547804
MSI-EM202-8I4IO 10/1021 547814
MSI-EM200-4RO MSI-EM201-4RO 02/1002 547805
MSI-EM202-4RO 02/1002 547815

Table of contents
Leuze electronic MSI 100/200 3
Table of contents
1 For your safety ...................................................................................................................................................... 7
1.1 Labeling of the warning notices ............................................................................ 7
1.2 Qualification of the users ...................................................................................... 7
1.3 Range of application of the product ...................................................................... 8
1.3.1 Intended use ......................................................................................... 8
1.3.2 Changes to the product ......................................................................... 9
1.4 Safety notices ....................................................................................................... 9
1.4.1 General safety notices .......................................................................... 9
1.4.2 Electrical safety .................................................................................. 11
1.4.3 Safety of machines or systems ........................................................... 12
1.4.4 Safety when starting applications ........................................................ 13
1.5 Directives and standards .................................................................................... 13
1.6 Documentation.................................................................................................... 14
1.7 Safety hotline ...................................................................................................... 14
2 System description ............................................................................................................................................ 15
2.1 MSI 100/200 safety system: design and functionality ......................................... 15
2.2 Using the system ................................................................................................ 18
2.3 Safe state............................................................................................................ 19
2.4 System start-up and restart behavior.................................................................. 19
2.5 Error detection .................................................................................................... 21
2.6 Error state ........................................................................................................... 21
2.7 Diagnostic tools................................................................................................... 22
2.8 Password protection ........................................................................................... 22
3 MSI 100 and MSI 200 safety modules ........................................................................................................ 23
3.1 Product description ............................................................................................. 23
3.1.1 Connection of extension devices ........................................................ 25
3.2 Operating modes (status) of the safety modules ................................................ 26
3.3 Operating and indication elements ..................................................................... 27
3.3.1 Diagnostic and status indicators ......................................................... 27
3.3.2 Confirm button ..................................................................................... 28
3.3.3 USB interface ...................................................................................... 28
3.3.4 AC-MSI-CFG1 ..................................................................................... 30
3.4 Signal connections.............................................................................................. 31
3.4.1 Safe inputs .......................................................................................... 31
3.4.2 Safe outputs ........................................................................................ 32
3.4.3 Signal outputs ..................................................................................... 33
3.4.4 Clock outputs ...................................................................................... 33
3.4.5 Ground-switching outputs ................................................................... 34
3.4.6 Supply connections ............................................................................. 34
4 MSI-EM200-8I4IO safe extension module ................................................................................................. 36
4.1 Product description ............................................................................................. 36
4.2 Diagnostic and status indicators ......................................................................... 37
4.3 Signal connections.............................................................................................. 38
4.3.1 Safe inputs .......................................................................................... 38
4.3.2 Safe outputs ........................................................................................ 38

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Leuze electronic MSI 100/200 4
4.3.3 Clock/signal outputs ............................................................................ 39
4.3.4 Supply connections ............................................................................. 41
5 MSI-EM200-4RO safe extension module .................................................................................................. 42
5.1 Product description ............................................................................................. 42
5.2 Diagnostic and status indicators ......................................................................... 44
5.3 Signal connections.............................................................................................. 45
5.3.1 Safe relay outputs ............................................................................... 45
5.3.2 Signal outputs ..................................................................................... 47
5.3.3 Supply connections ............................................................................. 47
6 Wiring examples ................................................................................................................................................. 49
6.1 Information on the wiring examples .................................................................... 49
6.2 Single-channel assignment of the safe digital inputs .......................................... 49
6.2.1 Cross circuit monitoring switched on ................................................... 49
6.2.2 Cross circuit monitoring switched off, external supply ........................ 50
6.2.3 External supply (OSSD) ...................................................................... 51
6.3 Two-channel equivalent assignment of the safe digital inputs............................ 52
6.3.1 Cross circuit monitoring switched on, supplied by T0 and T1 ............. 52
6.3.2 Cross circuit monitoring switched off, external supply ........................ 53
6.3.3 External supply (OSSD) ...................................................................... 54
6.4 Two-channel antivalent assignment of the safe digital inputs............................. 55
6.4.1 Cross circuit monitoring switched on, supplied by T0 and T1 ............. 55
6.4.2 Cross circuit monitoring switched off, external supply ........................ 56
6.5 Safe digital outputs ............................................................................................. 57
6.5.1 Information on the protective circuitry of external relays/contactors 
(freewheeling circuit) ........................................................................... 57
6.5.2 Single-channel assignment of the safe digital outputs ........................ 58
6.5.3 Two-channel assignment of the safe digital outputs ........................... 59
6.6 Safe relay outputs ............................................................................................... 60
6.6.1 Information on the protective circuitry of external relays/contactors 
(freewheeling circuit) ........................................................................... 60
6.6.2 Single-channel assignment of the safe relay outputs .......................... 60
6.6.3 Single-channel assignment of the safe relay outputs .......................... 61
7 Mounting, removal and electrical installation ............................................................................................ 62
7.1 Safety notices for mounting, removal and electrical installation ......................... 62
7.2 Mounting ............................................................................................................. 63
7.2.1 Mounting instructions .......................................................................... 63
7.2.2 Mounting location ................................................................................ 63
7.2.3 Mounting ............................................................................................. 64
7.3 Removal.............................................................................................................. 65
7.4 Electrical installation ........................................................................................... 66
7.4.1 Connecting signal lines ....................................................................... 67
7.4.2 Connecting the supply voltage ............................................................ 69
7.4.3 Example connection of an MSI 100/200 system ................................. 72
8 Firmware update ................................................................................................................................................ 73
8.1 Safety notices for the firmware update ............................................................... 73
8.2 Requirement for firmware update ....................................................................... 74
8.3 Running a firmware update................................................................................. 74

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Leuze electronic MSI 100/200 5
9 MSIsafesoft configuration software .............................................................................................................. 75
9.1 Installing software ............................................................................................... 75
9.2 Opening the software help system...................................................................... 76
10 Configuration and commissioning ................................................................................................................ 77
10.1 Example for configuration and commissioning ................................................... 77
10.2 Downloading configuration from the MSIsafesoft configuration software ........... 80
10.3 Loading the configuration using the AC-MSI-CFG1 memory module................. 84
10.4 Uploading the configuration from the safety module .......................................... 86
10.5 Function Test ...................................................................................................... 87
10.5.1 Performing function test with the help of online mode ........................ 87
11 Diagnosis .............................................................................................................................................................. 89
11.1 Diagnosis via LED indicators on the module ...................................................... 89
11.1.1 MSI 100 and MSI 200 ......................................................................... 90
11.1.2 MSI-EM200-8I4IO ............................................................................... 93
11.1.3 MSI-EM200-4RO ................................................................................. 94
12 Problems and solutions ................................................................................................................................... 95
12.1 General ............................................................................................................... 95
12.2 Graphical connection editor ................................................................................ 96
12.3 Configuration editor............................................................................................. 96
12.4 Online communication between MSIsafesoft and the safety module ................ 97
12.5 Communication between the safety module and the safe extension module ..... 99
12.6 Safety module messages.................................................................................... 99
13 Maintenance, repair, decommissioning and disposal .......................................................................... 100
13.1 Maintenance ..................................................................................................... 100
13.2 Repair ............................................................................................................... 100
13.3 Decommissioning and disposal ........................................................................ 100
14 Technical data and ordering data ............................................................................................................... 101
14.1 Technical data MSI 100 and MSI 200 .............................................................. 101
14.2 Technical data MSI-EM200-8I4IO .................................................................... 107
14.3 Technical data MSI-EM200-4RO ..................................................................... 112
14.4 Certifications ..................................................................................................... 117
14.5 Conformity with EMC directive.......................................................................... 117
14.6 System requirements for the MSIsafesoft configuration software .................... 117
14.7 Ordering data.................................................................................................... 118
14.7.1 MSI 100/200 modules ....................................................................... 118
14.7.2 Software ............................................................................................ 118
14.7.3 Accessories ....................................................................................... 118
14.7.4 Gateways .......................................................................................... 118
14.8 Documentation.................................................................................................. 119
A Technical appendix ................................................................................................................. 120
A 1 Calculation of the power loss ............................................................................ 120
A 2 Switch-off time of the MSI 100/200 system....................................................... 124
A 3 Use of MSI 100/200 modules at altitudes above 2000 m above sea level ....... 125

Table of contents
Leuze electronic MSI 100/200 6
B List of appendices ................................................................................................................... 127
B.1 Figures.............................................................................................................. 127
B.2 Tables ............................................................................................................... 130
B.3 Index ................................................................................................................. 132
C Revision history....................................................................................................................... 135

For your safety
Leuze electronic MSI 100/200 7
1 For your safety
Read this manual thoroughly and store it for future reference.
1.1 Labeling of the warning notices
1.2 Qualification of the users
The use of products described in this manual is oriented exclusively to
– Certified electricians or persons instructed by certified electricians. The users must be
familiar with the relevant safety concepts of automation technology as well as with the
applicable standards and other regulations.
– Qualified application programmers and software engineers. The users must be familiar
with the relevant safety concepts of automation technology as well as with the applicable
standards and other regulations.
This is the safety alert symbol. It is used to alert you to potential personal injury
hazards.
There are three signal words for the severity of the possible injury.
DANGER
This indicates a danger with high degree of risk. If the danger is not avoided, it will
result in death or a severe injury.
WARNING
This indicates a danger with moderate degree of risk. If the danger is not avoided,
it may result in death or a severe injury.
CAUTION
This indicates a danger with low degree of risk. If the danger is not avoided, it may
result in a minor or moderate injury.
This icon with the ATTENTION signal word warns of actions that could result in
property damage or a malfunction.
Here, you can find additional information or other sources of information.

For your safety
Leuze electronic MSI 100/200 8
1.3 Range of application of the product
Only use the MSI 100/200 system in accordance with the range of application described in this
chapter.
1.3.1 Intended use
Only use the safety modules and safe extension modules of the MSI 100/200 system accord-
ing to the information provided in this section.
MSI 100/200 system The intended use of the MSI 100/200 system is safe shutdowns. Safe switch-on is not an
intended use.
All modules of the MSI 100/200 system are intended for use in the industrial sector.
The safety modules and safe extension modules can only perform their safety-relevant tasks
if they have been integrated in the execution process correctly and in such a way as to avoid
errors.
You must observe all information in this user manual as well as in the user manuals and online
help listed in "Documentation" on page 14.
Only use the modules of the MSI 100/200 system according to the provided technical data. 
See chapter 14 „Technical data and ordering data“ from page 101.
You can find further information on the use of the MSI 100/200 system under "Using the sys-
tem" on page 18.
MSI 100 and 
MSI 200 The MSI 100 and MSI 200 modules are configurable safety modules with 20 safe inputs and four safe outputs. The inputs are used for the evaluation of safety-relevant transducers, such
as E-Stop buttons or safety doors. The circuits are interrupted in a safe manner via the outputs.
In addition, four signal outputs, two clock outputs and two ground-switching outputs are avail-
able.
The MSI 100 safety module is a stand-alone device and cannot be extended with safe exten-
sion modules.
The MSI 200 safety module can be extended with safe inputs and outputs using safe extension
modules of the MSI 100/200 system.
You can connect one gateway to both safety modules for transferring diagnostic data.
MSI-EM200-8I4IO The MSI-EM200-8I4IO safe extension module is an extension to the MSI 200 safety module.
An additional four configurable inputs or outputs, two configurable clock or signal outputs as
well as eight safe inputs are thereby made available.
MSI-EM200-4RO The MSI-EM200-4RO safe extension module is an extension to the MSI 200 safety module.
An additional four safe relay outputs and four signal outputs are thereby made available.

For your safety
Leuze electronic MSI 100/200 9
MSIsafesoft The MSIsafesoft safe configuration software is designed for the configuration of the safety
modules as well as connected extension modules.
Safe function blocks and
functions in MSIsafesoft The MSIsafesoft configuration software provides safe function blocks and functions for creat- ing the safety logic. These are designed solely for use within the safety module and support
specific safety functions here.
The safe function blocks and functions can only perform their safety-related tasks within the
safe control system if they have been integrated into the execution process correctly and in
such a way as to avoid errors.
1.3.2 Changes to the product
Modifications to the hardware and firmware of the device are not permitted.
Improper work or changes to the device could endanger your safety or damage the device.
You may not repair the device. If the device is defective, contact Leuze electronic.
1.4 Safety notices
1.4.1 General safety notices
Documentation
Safety of 
personnel and equipment The safety of personnel and equipment can only be assured if the modules and safe function
blocks are used correctly. 
See chapter "Intended use" on page 8.
WARNING: Serious danger through improper use
Depending on the application, improper use of the MSI 100/200 system can place the user
in serious danger.
•Observe the safety notices in this chapter.
•Observe the warning notices at other locations in this document.
You must observe all information in this manual and other applicable documents. 
See chapter "Documentation" on page 14.

For your safety
Leuze electronic MSI 100/200 10
Qualified personnel Qualified personnel are, in the context of this manual, persons who, because of their educa-
tion, experience, and instruction, and their knowledge of relevant standards, regulations, acci-
dent prevention, and service conditions, have been authorized to carry out any required oper-
ations, and who are able to recognize and avoid any possible dangers.
In the context of the use of the MSI 100/200 system with the MSIsafesoft configuration soft-
ware and safe function blocks, the following operations may only be carried out by qualified
personnel:
– Planning, configuration (development of safety logic)
– Installation, commissioning, servicing
– Maintenance, decommissioning
Requirements Knowledge of the following topics and products is required:
– The safety and safe extension modules used in the MSI 100/200 system
– The used peripherals (extension devices, sensors, actuators)
– Operating the MSIsafesoft configuration software
– Standards of safety technology
– Safety regulations in the area of application
Error detection Depending on the wiring and the configuration, the safety modules and safe extension mod-
ules of the MSI 100/200 system detect errors within the safety-related equipment.
Do not open the housing It is prohibited to open the housing of the modules. If the housing is opened, the function of the
MSI 100/200 modules is no longer guaranteed.
Misconnection and incor-
rect polarity of the connec-
tions
Take measures to protect against misconnection, polarity reversal and tampering at the con-
nections.
The individual terminal blocks of all MSI 100/200 modules are mechanically coded to prevent
incorrect connection.

For your safety
Leuze electronic MSI 100/200 11
1.4.2 Electrical safety
Direct / indirect contact Protection against direct and indirect contact according to VDE 100 part 410 must be ensured
for all components connected to the system. In the event of an error, no hazardous parasitic
voltages may occur (single-fault tolerance).
Mandatory measures:
– Use power supply units with safe insulation (PELV)
– Decoupling of circuits that are not PELV systems 
With the following components: optical couplers, relays or other components that satisfy
the requirements for safe insulation
Safe insulation Only use devices with safe insulation if hazardous contact voltages can occur at their connec-
tions.
Power supply units for 
24-V supply Only use power supply units with safe insulation and PELV in accordance with EN 50178 /
VDE 0160. These units prevent short circuits between primary and secondary sides.
Connect the output-side GND connection of the power supply unit to the functional earth (FE)
of the system.
Ground connection Ensure that all inputs and outputs of the system are connected to the same ground.
Insulation dimensioning When selecting the equipment, take into account the contamination and overvoltages that
occur during operation. If necessary, take appropriate measures for voltage limitation.
Installation space and 
installation position Observe the requirements listed in the technical data regarding the installation space and the installation position.
ESD note
WARNING: Loss of the safety function / hazardous body currents
Incorrect installation can result in loss of the safety function as well as in hazardous body
currents. Depending on the application, the user may be exposed to severe dangers.
•Observe the notices for electrical safety.
•Observe the warning notices at other locations in this document.
•Dimension the used devices and design their installation in the system according to the
specific requirements.
•Retest the equipment and systems that are retrofitted with the safety relay.
•Observe the information in the user documentation for other used devices
(e.g., sensors, actuators or extension devices).
ATTENTION: Electrostatic discharge
Electrostatic discharge can damage or destroy components. When handling, take the nec-
essary safety precautions against electrostatic discharge (ESD) according to EN 61340-5-1
and IEC 61340-5-1.

For your safety
Leuze electronic MSI 100/200 12
1.4.3 Safety of machines or systems
The safety of the machine or system and of the application in which the machine or system is
used is the responsibility of the machine/system manufacturer and of the operating company.
Draw up and implement a
safety concept In order to use the system described in this document with the associated safe function blocks, you must have drawn up an appropriate safety concept for your machine or system. This
includes the hazard and risk analysis, among others, according to the directives and standards
listed in chapter "Directives and standards" on page 13.
The target safety integrity level is ascertained on the basis of the risk analysis.
– SIL acc. to IEC 61508
– SILCL acc. to EN 62061
– Cat./PL acc. to EN ISO 13849-1
The following are dependent on the ascertained safety integrity:
– The wiring of safe sensors, command devices and actuators within the overall safety func-
tion
– The use of safe function blocks in the safety logic. 
The safety logic is created using the MSIsafesoft configuration software.
Safety-related equipment For the sensible use of the MSI 100/200 system, provide the machine with safety-related
equipment.
This includes, for example:
– E-Stop buttons
– Protection hood switches
– Enabling switches
– Light barriers
Testing hardware and con-
figuration Carry out a validation every time you make a safety-related modification to your overall sys- tem.
Use the relevant checklists when carrying out the validation. Enter the details requested in the
"Project Information" dialog box in the MSIsafesoft safe configuration software.
Use your test report to satisfy yourself that:
– The safe sensors and actuators are connected correctly in the MSI 100/200 safety appli-
cation. To do this, use the "Wiring check" function in the MSIsafesoft configuration soft-
ware.
– The inputs and outputs of the safety modules and the safe extension modules are cor-
rectly configured.
– The signals have been connected to the safe sensors and actuators correctly (single-
channel or two-channel).
– Cross-circuit detection is implemented in your application, if required (see page 22).
– All safe function blocks and functions in the MSIsafesoft configuration software are con-
nected correctly.

For your safety
Leuze electronic MSI 100/200 13
Disconnecting the USB
connection For the safe operation of the machine or system, there must be no USB connection to the safety modules.
For further information, refer to Chapter "USB interface" on page 28.
1.4.4 Safety when starting applications
Take the following into account when defining the start conditions for your machine or system:
– The machine or system may only be started if it is ensured that no persons are located in
the danger zone.
– Comply with the requirements of EN ISO 13849-1 with regard to the manual reset func-
tion.
This applies for:
– The switching on of safe participants
– The acknowledgment of device error messages
– The canceling of start interlocks for safety functions
Observe start-up behavior Some of the safe function blocks in the MSIsafesoft configuration software have parameters
for specifying a start interlock and/or a restart interlock.
For further information, refer to Chapter "System start-up and restart behavior" on page 19.
1.5 Directives and standards
The standards with which the MSI 100/200 system complies can be found in the certificate of
the approval body and the EC Declaration of Conformity.
You can find these documents on the Internet. 
See www.leuze.com.

For your safety
Leuze electronic MSI 100/200 14
1.6 Documentation
Latest documentation Always use the latest documentation. You can find changes or additions on the Internet.
See www.leuze.com.
You must observe all information from the following sources:
– Technical description of the safety modules
– Technical description of the safe extension modules
– User documentation for peripheral devices (e.g., sensors/actuators) that are connected to
the MSI 100/200 modules and are connected to safe function blocks in the safety logic
(MSIsafesoft configuration software)
– Documentation for the supplementary standard technology
– Help system for the MSIsafesoft safe configuration software and for each of the safe func-
tion blocks (see "Opening the software help system" on page 76)
1.7 Safety hotline
If you have technical questions, please use our 24-hour hotline.
Additional information and detailed step-by-step instructions for the MSIsafesoft configura-
tion software can be found in the help system of the software.
Phone: [phone]
E-mail: [email protected]

System description
Leuze electronic MSI 100/200 15
2Systemdescription
2.1 MSI 100/200 safety system: design and functionality
Overall system: 
Hardware and software The MSI 100/200 safety system consists of the following components:
When using the MSI 100 safety module:
–MSI100 safety module
– MSIsafesoft configuration software
– Safe command devices, sensors, and actuators (depending on the application)
When using the MSI 200 safety module:
–MSI200 safety module
– Optional safe extension modules MSI-EM200-8I4IO / MSI-EM200-4RO
– MSIsafesoft configuration software
– Safe command devices, sensors, and actuators (depending on the application)
The diagram below illustrates the overall system in an application example with the MSI 200.
Figure 2-1 Typical structure of a safety system with MSI 200
Upload online values
during the function test
Download configura-
tion and control pa-
rameters
Reset button for 
removing active 
start/restart interlocks
Control signals for the con-
tactors at the safety module
outputs
Readback signal from the
monitoring contacts of the
contactor
Single-channel or
two-channel con-
nection to safety
module
Safe command devices or
sensors
MSIsafesoft 
on configuration computer
Indicator lamp
Check valve
Motor
USB
MSI 200
Contactor or 
relay
MSI-EM200-8I4IO

System description
Leuze electronic MSI 100/200 16
Communication via USB Communication between the MSI 100 or MSI 200 safety modules and the configuration soft-
ware takes place via a USB interface.
Communication between the safety module and the configuration software on the PC takes
place in both directions:
PC safety module
The configuration data and device parameters are downloaded from the configuration PC to
the safety module. Configuration data refers to the application logic, which you created using
the MSIsafesoft configuration software.
The configuration can also be downloaded using the AC-MSI-CFG1 pluggable memory mod-
ule. Please refer to "Downloading configuration from the MSIsafesoft configuration software"
on page 80 and "Loading the configuration using the AC-MSI-CFG1 memory module" on
page 84.
Safety module PC
For diagnostic purposes, online values can be read from the safety module via the USB inter-
face and displayed "live" in the software. For more detailed information, please refer to "Func-
tion Test" on page 87.
Communication via the
DIN rail connector The MSI 100 safety module is equipped with an interface for the yellow MSI-TBUS DIN rail connector. The MSI 200 safety module is equipped with two interfaces for the yellow
MSI-TBUS.
In combination with the green TBUS DIN rail connector, connect a maximum of one non-safe
extension device (gateway) to the MSI 100 or MSI 200 safety module.
WARNING: Non-safe operation
The USB interface is not protected against ESD. If a there is a USB connection in place, the
safety module is in non-safe operation. The safety function cannot be properly executed.
•Only use the USB connection for commissioning.
•Disconnect the USB connection for regular operation.

System description
Leuze electronic MSI 100/200 17
Use additional yellow MSI-TBUS DIN rail connectors to connect up to ten safe extension mod-
ules to the MSI 200 safety module.
Figure 2-2 Extension of the MSI 200 safety module
Communication between the safe modules and the non-safe or safe extension modules takes
place automatically via the connectors of the DIN rail connectors.
See also chapter "Mounting" on page 63.
Other standard bus participants are possible. For further information, refer to the user doc-
umentation of the used gateway at www.leuze.com.
ATTENTION: Connector wear
The modules may be connected to the DIN rail connectors a maximum of eight mating
cycles.
Note the maximum permissible continuous current for extension modules supplied via the
MSI-TBUS as well as the technical data of the MSI 100/200 system.
See Chapter "Technical data and ordering data" on page 101.
AC-MSI-TCS
Art.-Nr. 547821
MSI 200
MSI-EM200
8I4I0/4RO
MSI-EM200
8I4I0/4RO
TBUS
GATEWAY
AC-MSI-TC
Art.-Nr. 547823
MSI-TBUS
MSI-TBUS
MSI-TBUS
MSI-TBUS
Safe 
communication area
Non-safe 
communication area

System description
Leuze electronic MSI 100/200 18
2.2 Using the system
Safety circuits The safety modules of the MSI 100/200 system can be flexibly configured. For the creation of
the safety logic, the system is equipped with safe function blocks. You can thereby use the
MSI 100/200 system to implement various safety functions in different safety circuits. Just
some of the most important options are listed below:
– E-Stop monitoring
– Safety door monitoring (with and without locking device)
– Two-hand control units (types II and III)
– External device monitoring (EDM)
– Monitoring and checking electro-sensitive protective equipment
– Operating mode selector switch (evaluation of an operating mode selector switch and an
enabling switch)
– Muting applications (light grid monitoring with parallel muting)
Application examples:
In the help system of the MSIsafesoft configuration software, you can find application exam-
ples for the safe function blocks with typical application for each function block.
The safety logic configured in the configuration software as well as the wiring of the safety
modules and the safe extension modules is displayed in the form of schematic views.
The online help also includes typical signal sequence diagrams, which illustrate the behavior
of each function block.
The following application examples are included in the online help for the function blocks:
– Single-channel and two-channel E-Stop circuits
– Single-channel and two-channel safety door monitoring, with and without locking
– Operating mode selection with locking of the set operating mode and manual operating
mode acknowledgment
– Evaluation of a three-position enabling switch with confirmation of the selected safe
operating mode
– Parallel muting with two sensors
– Evaluation of a light curtain connected via a single channel
– Type II and type III two-hand control devices

System description
Leuze electronic MSI 100/200 19
2.3 Safe state
The safe state of an output terminal block is defined as the power off mode (signal value "0").
The safe state can be assumed by the MSI 100/200 system in the following cases:
1. Operating state (by triggering the safety function)
2. Error detection in the peripherals
3. Device error
4. Configuration error
5. Error detection in safe communication
2.4 System start-up and restart behavior
Start-up Start-up refers to the behavior of the MSI 100 and MSI 200 safety modules and the optional
safe extension modules after switching on (or applying the supply voltage) and after configur-
ing via USB interface or AC-MSI-CFG1.
Unless a start interlock is configured, the safety module starts up immediately following suc-
cessful configuration (i.e., after pressing the "Confirm" button). The safe inputs are evaluated
and the outputs controlled accordingly.
Restart Restart refers to the behavior of the safety modules and the optional safe extension modules
after the safety function is triggered and the subsequent return to normal operation. Normal
operation is restored, e.g., by unlocking the E-Stop command device, after which safe opera-
tion is again possible.
With an active start/restart interlock, the corresponding safe module output remains in the safe
state. This prevents an undesired start/restart of a machine controlled by the relevant output.
WARNING: Unintended machine start-up
Start/restart after switching on voltage as well as the discontinued demand for the safety
function can result in undesired machine start-up.
•Note the following:
– The module starts up immediately after completing the configuration.
– The module restarts immediately if the trigger of the safety function is reset.
•If automatic start/restart is not desired, configure automatic start/restart accordingly in
the safety logic.

System description
Leuze electronic MSI 100/200 20
Reset button
An active start/restart interlock can be released by actuating a reset button that is connected
and appropriately wired to the safety module or to the safe extension modules.
The reset signal is used at the same time to exit the error state once the error cause has been
removed.
Implementation using 
safe function blocks To implement a start/restart interlock, use the safe function blocks in the MSIsafesoft configu- ration software which have the relevant parameters for activating the start/restart interlock.
To configure a start interlock for a specific safe output, for example, this output must be
directly connected in the safety logic to the output of a safe function block, for which a start
interlock is set via the parameters.
WARNING: Unintended machine start-up
Acknowledgment of an error results in the safe input or output being immediately returned to
the operating state.
•Before acknowledging an error, make certain that acknowledgment cannot result in a
dangerous machine state.
•When planning the machine or system, make certain that acknowledgment is possible
only if the danger zone is visible.
In accordance with EN ISO 13849-1, the manual reset function must not trigger a machine
start.
You can find further information on the implementation of a start/restart interlock in the help
system of the MSIsafesoft configuration software.